Hi i would like to advice all of you about the poor support that blacx offers. I have a bromen seatpost that i sent to blacx on March 2011 and it isn't repaired yet.
Look at the Spanish forum foromtb to see all the comenta about the Brand.

I saw a link to those and they LOOKED pretty sweet. They make a lot of quality claims and have a model with enough travel for me. I'm not sure if they're even distributed here in the U.S.. But thanks for the warning.